CUDA option not shown when using an old GPU
You are out of luck.

The graphics card in question is quite old and has a Cuda compute capability 1.2, which is not supported in blender anymore

To use GPU rendering in Blender you need a card with a 2.0 compute capability.

Form the manual:


  NVIDIA CUDA is supported for GPU rendering with NVIDIA graphics cards. We support graphics cards starting from GTX 4xx (computing capability 2.0).


read:
How to enable GPU rendering on older Nvidia GPUs?

and
Enabling GPU rendering for Cycles?

Even if you where able to somehow hack GPU rendering with that card, it is likely going to be equal or slower than rendering on CPU.